code: def test_psd_array_welch_n_jobs():
      """Test that n_jobs works even with more jobs than channels."""
      data = np.zeros((1, 2048))
      psd_array_welch(data, 1024, n_jobs=1)
      psd_array_welch(data, 1024, n_jobs=2)
  
file_path: mne-python/mne/time_frequency/tests/test_psd.py
imports: import numpy
  import pytest
  from numpy.testing import assert_allclose, assert_array_almost_equal, assert_array_equal
  from scipy.signal import welch
  from mne.time_frequency import psd_array_multitaper, psd_array_welch
  from mne.time_frequency.multitaper import _psd_from_mt
  from mne.time_frequency.psd import _median_biases
  from mne.utils import catch_logging
label_desc: Use image node_id 10 for calling a global function with example usage: test_psd_array_welch_n_jobs() without return types